package cn.edu.scau.cmi.luochenghao.chapter07;

interface Computable {
	int MAX=100;
	int f(int x);
}

class China implements Computable {
	int number;
	public int f(int x) {
		int sum=0;
		for(int i=1;i<=x;i++) {
			sum+=i;
		}
		return sum;
	}
}

class Japan implements Computable {
	int number;
	public int f(int x) {
		return 46+x;
	}
}

public class Example7_1 {

	public static void main(String[] args) {
		China zhang;
		Japan henlu;
		zhang=new China();
		henlu=new Japan();
		zhang.number=28+Computable.MAX;
		henlu.number=14+Computable.MAX;
		System.out.println("zhang的学号"+zhang.number+",zhang求和结果"+zhang.f(100));
		System.out.println("henlu的学号"+henlu.number+",henlu求和结果"+henlu.f(100));
	}

}
